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I don't understand. I have to select the correct painting function to use after checking for alpha channel. Ie:

IF HASALPHA()
use ABPAINT()
ELSE
use something else
ENDIF

EMG

BitBlt() is the fastest way to manage bitmaps

Not sure if there is a flag we could used for Alpha channel detection

Thank you. I will wait for something faster. I'm going to drop alpha channel support in my application, for the moment.

EMG

This is an interesting reading and this code may be the simplest way to do it: https://www.gamedev.net/topic/607214-get-alpha-channel-from-32bit-bmp/ struct ABGRStruct {        BYTE a,b,g,r;    };    FILE *f = fopen("the_file_name.bmp", ...

What is the official way to load an image and to check for alpha channel without using classes?

EMG

The function HasAlpha doesn't work anymore. It returns .T. even if the image doesn't have an alpha channel. I noticed that the function has been changed in dibbmp.c, don't know exactly when.

EMG

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... you. But you can create small modules of work, to see such few data of consultation and the phone is perfect for it purpose. It is another way and channel that can coexist with our applications, without any discussion.

... color I don't know any reason to use it. But You can use something like : if IsAlpha ( aTemp[ n ][ 1 ] ) to detect, if a image includes a alpha-channel http://www.pflegeplus.com/IMAGES/Alpha2.jpg Very useful to download PIXELFORMER Some links http://forums.fivetechsupport.com/viewtopic.php?f=3&t=23687&p=127412#p127412 ...

... not transparent, a new GDIPLUS-test showing animated transparent images. 1. extracted frames from Halo.gif 2. converted frames to PNG with alpha-channel 3. GDI-function to display animated images with defined speed, movement and intervall from inside a defined form. 4. move-direction can be horizontal ...

... la he obtenido desde este link http://stackoverflow.com/questions/4451839/how-to-render-a-transparent-cursor-to-bitmap-preserving-alpha-channel Gracias. :lol: :lol:

Antonio,

how can we paint faster an alpha-channel image with resize?

EMG

... interest this project may start and continue :D . Finally i also thanks Mr. Antonio Linares, ( the boss ;) ), for his opinion and help in this new channel based on our beloved FWH. Thanks a lot and greetings to all !!! Road to the Web... Carles.

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